[bpt/emacs.git] / src / m / ibms390.h

/* machine description file template.
   Copyright (C) 1985, 1986, 2001, 2002 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */


/* The following line tells the configuration script what sort of
   operating system this machine is likely to run.
   USUAL-OPSYS="<name of system .h file here, without the s- or .h>"  */

/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
   is the most significant byte.  */

#define WORDS_BIG_ENDIAN

/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
 * group of arguments and treat it as an array of the arguments.  */

#define NO_ARG_ARRAY

/* Define WORD_MACHINE if addresses and such have
 * to be corrected before they can be used as byte counts.  */

#define WORD_MACHINE

/* Now define a symbol for the cpu type, if your compiler
   does not define it automatically:
   Ones defined so far include vax, m68000, ns16000, pyramid,
   orion, tahoe, APOLLO and many others */

#define s390

/* Use type int rather than a union, to represent Lisp_Object */
/* This is desirable for most machines.  */

#define NO_UNION_TYPE

/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
   the 24-bit bit field into an int.  In other words, if bit fields
   are always unsigned.

   If you use NO_UNION_TYPE, this flag does not matter.  */

#define EXPLICIT_SIGN_EXTEND

/* Data type of load average, as read out of kmem.  */

#define LOAD_AVE_TYPE long

/* Convert that into an integer that is 100 for a load average of 1.0  */

#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)

/* Define CANNOT_DUMP on machines where unexec does not work.
   Then the function dump-emacs will not be defined
   and temacs will do (load "loadup") automatically unless told otherwise.  */

/* #define CANNOT_DUMP */

/* Define VIRT_ADDR_VARIES if the virtual addresses of
   pure and impure space as loaded can vary, and even their
   relative order cannot be relied on.

   Otherwise Emacs assumes that text space precedes data space,
   numerically.  */

#define VIRT_ADDR_VARIES

/* Define NO_REMAP if memory segmentation makes it not work well
   to change the boundary between the text section and data section
   when Emacs is dumped.  If you define this, the preloaded Lisp
   code will not be sharable; but that's better than failing completely.  */

/*#define NO_REMAP */

/* Some really obscure 4.2-based systems (like Sequent DYNIX)
 * do not support asynchronous I/O (using SIGIO) on sockets,
 * even though it works fine on tty's.  If you have one of
 * these systems, define the following, and then use it in
 * config.h (or elsewhere) to decide when (not) to use SIGIO.
 *
 * You'd think this would go in an operating-system description file,
 * but since it only occurs on some, but not all, BSD systems, the
 * reasonable place to select for it is in the machine description
 * file.
 */

/*#define NO_SOCK_SIGIO*/


/* After adding support for a new system, modify the large case
   statement in the `configure' script to recognize reasonable
   configuration names, and add a description of the system to
   `etc/MACHINES'.

   If you've just fixed a problem in an existing configuration file,
   you should also check `etc/MACHINES' to make sure its descriptions
   of known problems in that configuration should be updated.  */
Commit	Line	Data
e64fed1d	1	/* machine description file template.
d8f6d720	2	Copyright (C) 1985, 1986, 2001, 2002 Free Software Foundation, Inc.
e64fed1d EZ	3
	4	This file is part of GNU Emacs.
	5
	6	GNU Emacs is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2, or (at your option)
	9	any later version.
	10
	11	GNU Emacs is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GNU Emacs; see the file COPYING. If not, write to
	18	the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
	20
	21
177c0ea7	22	/* The following line tells the configuration script what sort of
e64fed1d EZ	23	operating system this machine is likely to run.
	24	USUAL-OPSYS="<name of system .h file here, without the s- or .h>" */
	25
	26	/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
	27	is the most significant byte. */
	28
	29	#define WORDS_BIG_ENDIAN
	30
	31	/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
	32	* group of arguments and treat it as an array of the arguments. */
	33
	34	#define NO_ARG_ARRAY
	35
	36	/* Define WORD_MACHINE if addresses and such have
	37	* to be corrected before they can be used as byte counts. */
	38
	39	#define WORD_MACHINE
	40
	41	/* Now define a symbol for the cpu type, if your compiler
	42	does not define it automatically:
	43	Ones defined so far include vax, m68000, ns16000, pyramid,
	44	orion, tahoe, APOLLO and many others */
	45
	46	#define s390
	47
	48	/* Use type int rather than a union, to represent Lisp_Object */
	49	/* This is desirable for most machines. */
	50
	51	#define NO_UNION_TYPE
	52
	53	/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
	54	the 24-bit bit field into an int. In other words, if bit fields
	55	are always unsigned.
	56
	57	If you use NO_UNION_TYPE, this flag does not matter. */
	58
	59	#define EXPLICIT_SIGN_EXTEND
	60
	61	/* Data type of load average, as read out of kmem. */
	62
	63	#define LOAD_AVE_TYPE long
	64
	65	/* Convert that into an integer that is 100 for a load average of 1.0 */
	66
	67	#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
	68
	69	/* Define CANNOT_DUMP on machines where unexec does not work.
	70	Then the function dump-emacs will not be defined
	71	and temacs will do (load "loadup") automatically unless told otherwise. */
	72
	73	/* #define CANNOT_DUMP */
	74
	75	/* Define VIRT_ADDR_VARIES if the virtual addresses of
	76	pure and impure space as loaded can vary, and even their
	77	relative order cannot be relied on.
	78
	79	Otherwise Emacs assumes that text space precedes data space,
	80	numerically. */
	81
	82	#define VIRT_ADDR_VARIES
	83
e64fed1d EZ	84	/* Define NO_REMAP if memory segmentation makes it not work well
	85	to change the boundary between the text section and data section
	86	when Emacs is dumped. If you define this, the preloaded Lisp
	87	code will not be sharable; but that's better than failing completely. */
	88
	89	/#define NO_REMAP /
	90
	91	/* Some really obscure 4.2-based systems (like Sequent DYNIX)
	92	* do not support asynchronous I/O (using SIGIO) on sockets,
	93	* even though it works fine on tty's. If you have one of
	94	* these systems, define the following, and then use it in
	95	* config.h (or elsewhere) to decide when (not) to use SIGIO.
	96	*
	97	* You'd think this would go in an operating-system description file,
	98	* but since it only occurs on some, but not all, BSD systems, the
	99	* reasonable place to select for it is in the machine description
	100	* file.
	101	*/
	102
	103	/#define NO_SOCK_SIGIO/
	104
	105
	106	/* After adding support for a new system, modify the large case
	107	statement in the `configure' script to recognize reasonable
	108	configuration names, and add a description of the system to
	109	`etc/MACHINES'.
	110
	111	If you've just fixed a problem in an existing configuration file,
	112	you should also check `etc/MACHINES' to make sure its descriptions
	113	of known problems in that configuration should be updated. */